BONE CONDUCTION ACCELEROMETER MICROPHONE

摘要

A bone-conduction microphone of the acceleration type for emplacement in a user's ear employs a cantilever mounted piezoelectric bar having a pair of metallizations on opposite faces. An elongated weight is affixed to a free end of the bar and transversely disposed with respect thereto, resulting in a T-shaped structure having its principal mass concentrated at the extreme end of the piezoelectric bar. A closely fitting housing allows this microphone assembly to occupy a volume of approximately 4 mm, by 6 mm, by 3 mm. Associated electronics are mounted within the housing, and have contacting terminals extending outward therefrom.